Update README and add contrib dir

contrib/traffic-generator/model/myCustomApp.h

@@ -0,0 +1,66 @@
+#ifndef MY_CUSTOM_APP_H
+#define MY_CUSTOM_APP_H
+
+#include "ns3/application.h"
+#include "ns3/event-id.h"
+#include "ns3/ptr.h"
+#include <ns3/traced-callback.h>
+#include "ns3/point-to-point-net-device.h"
+
+namespace ns3
+{
+
+class Socket;
+class Packet;
+
+
+class myCustomApp : public Application
+{
+  public:
+    /**
+     * \brief Get the type ID.
+     * \return the object TypeId
+     */
+    static TypeId GetTypeId();
+
+    myCustomApp();
+
+    ~myCustomApp() override;
+
+    /**
+     * \return the total bytes sent by this app
+     */
+    uint64_t GetTotalTx() const;
+    uint64_t GetTotalRx() const;
+
+    void Setup(Ptr<PointToPointNetDevice> net, int t);
+    bool RxPacket(Ptr<NetDevice> dev, Ptr<const Packet> pkt, uint16_t mode, const Address& sender);
+
+  protected:
+    void DoDispose() override;
+
+  private:
+    void StartApplication() override;
+    void StopApplication() override;
+
+    /**
+     * \brief Send a packet
+     */
+    void Send();
+
+    uint32_t m_count; //!< Maximum number of packets the application will send
+    Time m_interval;  //!< Packet inter-send time
+    uint32_t m_size;  //!< Size of the sent packet (including the SeqTsHeader)
+
+    uint32_t m_sent;       //!< Counter for sent packets
+    uint64_t m_totalRx;    //!< Total bytes sent
+    uint64_t m_totalTx;    //!< Total bytes rcvd
+    Address m_peerAddress; //!< Remote peer address
+    uint16_t m_peerPort;   //!< Remote peer port
+    EventId m_sendEvent;   //!< Event to send the next packet
+    Ptr<PointToPointNetDevice> m_net;
+};
+
+} // namespace ns3
+
+#endif